Plzz solve
Dear student.
| Class interval | X | frequency | cf | fx |
| 0-10 | 5 | 25 | 25 | 125 |
| 10-20 | 15 | 15 | 40 | 225 |
| 20-30 | 25 | 20 | 60 | 500 |
| 30-40 | 35 | 15 | 75 | 525 |
| 40-50 | 45 | 20 | 95 | 900 |
| 50-60 | 55 | 30 | 125 | 1650 |
| 60-70 | 65 | 65 | 190 | 4225 |
| 70-80 | 75 | 50 | 240 | 3750 |
| Total | 240 | 11900 |